html,
body {
  width: 100%;
  height: 100%;
}

#app {
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.pull-left {
  float: left;
}

.pull-right {
  float: right;
}

.clear:after {
  display: block;
  content: "";
  clear: both;
}
